<template>
  <h2>当前求和为：{{sum}}</h2>
  <button @click="sum++">点我+1</button>
  <hr>
  <h2>当前点击时鼠标的坐标为：x：{{point.x}}，y：{{point.y}}</h2>
</template>

<script>
import { ref } from 'vue'
import usePoint from '../hooks/usePoint'
export default {
  name: 'Demo',
  setup() {
    console.log("---setup---")
    // 数据
    let sum = ref(0)
    
    let point = usePoint()
    
    // 返回一个对象（常用）
    return {
      sum, point
    }
  }
}
</script>